5-Pin Automotive Waterproof Connector – HD057Y-1.5-21, Plastic Wire Harness Connector

HD057Y-1.5-21 is a 5-pin waterproof automotive connector used for sensor and actuator wiring harness connections. The designation decodes as: HD057Y = connector series; 1.5 = 1.5mm contact pitch; 21 = housing variant. The 5-pin configuration is common for sensors and actuators requiring power supply, ground, and multiple signal circuits: throttle position sensors (TPS), mass airflow sensors (MAF), and multi-function actuators. IP67 waterproof construction ensures reliable operation in engine bay and underbody mounting locations.

Key Specifications

• Part Number: HD057Y-1.5-21
• Pin Count: 5 pins
• Contact Pitch: 1.5mm
• IP Rating: IP67
• Housing Material: PA66 nylon, flame retardant
• Operating Temperature: -40°C to +125°C
• Application: Automotive sensor and actuator wiring harness connections

5-Pin Connector — Common Sensor Applications

• Throttle Position Sensor (TPS): 5V supply, ground, TPS1 signal, TPS2 signal, and idle switch — 5-pin connectors are standard for dual-track TPS sensors
• Mass Airflow Sensor (MAF): Power supply, ground, MAF signal, intake air temperature signal, and shield/return — 5-pin connectors for combined MAF/IAT sensors
• Camshaft/Crankshaft sensors: Some variable valve timing actuators use 5-pin connectors for position feedback and control circuits
• Transmission solenoids: 5-pin connectors for multi-solenoid transmission control assemblies

Frequently Asked Questions

How do I identify the correct replacement for HD057Y-1.5-21?

The part number HD057Y-1.5-21 is typically molded into the connector housing. Cross-reference with the vehicle’s parts catalog or wiring diagram to verify it is the correct replacement. Verify: pin count (5), contact pitch (1.5mm), connector gender, and locking mechanism. For sensor connectors, also verify the connector orientation — some sensors have a specific connector orientation that determines which variant is required.

What contacts are compatible with HD057Y-1.5-21?

The HD057Y connector uses 1.5mm pitch contacts. Identify the correct contact part number from the connector’s datasheet or the vehicle’s wiring diagram parts list. 1.5mm contacts require a dedicated micro-crimp tool — do not use standard 2.8mm automotive crimp tools on 1.5mm contacts.

What fault codes indicate a sensor connector problem?

Sensor connector faults typically produce circuit-related fault codes: P0120–P0124 (TPS circuit), P0100–P0104 (MAF circuit), P0340–P0344 (CMP sensor circuit). These codes can be caused by corroded terminals, terminal push-back, or a cracked connector housing. Inspect the connector before replacing the sensor — connector repair is significantly cheaper than sensor replacement.

Typical Applications

• TPS repair: Replacing damaged throttle position sensor connector housings
• MAF sensor repair: Replacing damaged mass airflow sensor connector housings
• Actuator wiring: 5-pin actuator connector replacement
• Automotive workshops: Workshop stock for 5-pin sensor connector repairs

Package Contents

1 piece — HD057Y-1.5-21 5-pin automotive waterproof connector (housing as specified). Contacts and wire seals ordered separately if not included.